Publications associées à Properties of plasma turbulence in the periphery of diverted tokamaks

Heavy impurity transport in the presence of 3D MHD ideal perturbations

Heavy impurity accumulation poses a problem for the operation of tokamaks featuring tungsten plasma facing components. Early termination of the plasma due to tungsten accumulation is often observed following long living 3D MHD perturbations. Such scenarios ...

EPFL2022

Validation of edge turbulence codes against the TCV-X21 diverted L-mode reference case

Paolo Ricci, Holger Reimerdes, Christian Gabriel Theiler, Sophie Danielle Angelica Gorno, Claudia Colandrea, Nicola Vianello, Davide Galassi, Cedric Kar-Wai Tsui, Hugo De Oliveira, Maurizio Giacomin, Eric Serre, Nicola Offeddu

Self-consistent full-size turbulent-transport simulations of the divertor and scrape-off-layer (SOL) of existing tokamaks have recently become feasible. This enables the direct comparison of turbulence simulations against experimental measurements. In this ...

IOP Publishing Ltd2022

First global simulations of plasma turbulence in a stellarator with an island divertor

Paolo Ricci, Joaquim Loizu Cisquella, António João Caeiro Heitor Coelho

We present the results of 3D, flux-driven, global, two-fluid electrostatic turbulence simulations in a 5-field period stellarator with an island divertor. The numerical simulations are carried out with the GBS code, which solves the two-fluid drift-reduced ...

2021

Model-based optimization of magnetic control in the TCV tokamak: design and experiments

Federico Pesamosca

Thermonuclear controlled fusion is a promising answer to the current energy and climate issues, providing a safe carbon-free source of energy which is virtually inexhaustible. In magnetic confinement thermonuclear fusion based on tokamak reactors, hydrogen ...

EPFL2021

Turbulence in the scrape-off layer of double-null tokamak configurations

Carrie Fiona Beadle

Understanding the turbulent dynamics in the outermost region of the tokamak is essential to predict and control the heat and particle loads to the vessel wall, a crucial problem for the entire fusion program. In this thesis, the problem is approached via t ...

EPFL2021

Controlling the rotation of drift tearing modes by biased electrode in ADITYA-U tokamak

Harshita Raj, Ankit Kumar, Abhijit Sen, Rohit Kumar, Sameer Kumar

The influence of background plasma poloidal rotation on the rotation frequency of the m/n = 2/1 drift tearing mode (DTM) has been studied in ADITYA-U tokamak. The poloidal rotation velocity of the background plasma in the ion diamagnetic direction is incre ...

2021

Investigation of turbulent transport regimes in the tokamak edge by using two-fluid simulations

Paolo Ricci, Maurizio Giacomin

The results of flux-driven, two-fluid simulations in single-null configurations are used to investigate the processes determining the turbulent transport in the tokamak edge. Three turbulent transport regimes are identified: (i) a developed transport regim ...

2020

Investigating Scrape-Off Layer transport in alternative divertor geometries on the TCV tokamak

Roberto Maurizio

Thermonuclear fusion is a potentially clean and limitless energy source that can substantially change the current global electricity generation mix, which is highly dependent on limited fossil fuels. This thesis contributes to the development of fusion en ...

EPFL2020

X-point potential well formation in diverted tokamaks with unfavorable magnetic field direction

Basil Duval, Holger Reimerdes, Joaquim Loizu Cisquella, Marco Wischmeier, Mirko Wensing

Fluid simulations of the boundary of fusion plasmas predict the formation of an electric potential well in the vicinity of the X-point in detached divertor conditions with Bt in the unfavorable direction for H-mode access. This potential well arises when t ...

2020

Experimental verification of X-point potential well formation in unfavorable magnetic field direction

Basil Duval, Holger Reimerdes, Christian Gabriel Theiler, Joaquim Loizu Cisquella, Sophie Danielle Angelica Gorno, Claudia Colandrea, Marco Wischmeier, Cedric Kar-Wai Tsui, Mirko Wensing, Hugo De Oliveira

Recent TCV experiments confirm the predicted formation of an electric potential well, below the magnetic X-point, in configurations with unfavorable

B_t

field direction (ion

\nabla B

drift away from the divertor), that substantially reshapes the typica ...

2020

Properties of plasma turbulence in the periphery of diverted tokamaks

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Heavy impurity transport in the presence of 3D MHD ideal perturbations

Validation of edge turbulence codes against the TCV-X21 diverted L-mode reference case

First global simulations of plasma turbulence in a stellarator with an island divertor

Model-based optimization of magnetic control in the TCV tokamak: design and experiments

Turbulence in the scrape-off layer of double-null tokamak configurations

Controlling the rotation of drift tearing modes by biased electrode in ADITYA-U tokamak

Investigation of turbulent transport regimes in the tokamak edge by using two-fluid simulations

Investigating Scrape-Off Layer transport in alternative divertor geometries on the TCV tokamak

X-point potential well formation in diverted tokamaks with unfavorable magnetic field direction

Experimental verification of X-point potential well formation in unfavorable magnetic field direction

First global simulations of plasma turbulence in a stellarator with an island divertor

Model-based optimization of magnetic control in the TCV tokamak: design and experiments

Investigating Scrape-Off Layer transport in alternative divertor geometries on the TCV tokamak

Experimental verification of X-point potential well formation in unfavorable magnetic field direction

Heavy impurity transport in the presence of 3D MHD ideal perturbations

Validation of edge turbulence codes against the TCV-X21 diverted L-mode reference case

Turbulence in the scrape-off layer of double-null tokamak configurations

Controlling the rotation of drift tearing modes by biased electrode in ADITYA-U tokamak

Investigation of turbulent transport regimes in the tokamak edge by using two-fluid simulations

X-point potential well formation in diverted tokamaks with unfavorable magnetic field direction